errr, certainly, but you cannot execute a script at the init of wrp-placed objects, so you would have to set up triggers like the seb nam river crossing triggers maybe... but after all i'm not really into scripting. ;D
btw, that pond by mapfact isn't released yet, there are only some screenshots around.
but it's really simple to make such a water surface. just make a large plane in o2, like 40x40m wide, and map it with a semi-transparent seamless water texture. and if you don't have one yet... here you get one